Question

1. Is 2/12 = 5/28 a true proportion?

Step 1. Cross multiply.

2 x 28 = 12 x 56
56 = 672


Step 2. is the proportion true?

-----, because the cross products are not ----------.

The proportion -------- true, because 2/12 and 5/28 ------------ equivalent ratios.

Answer 1

Let's verify

• 2/12=5/28

Cross multiplication

• 2(28)=5(12)
• 56≠60

No the proportion is false they are not equivalent

Answer 2

`(2)/(12)=(5)/(28)`

Cross multiply:

⇒ 2 x 28 = 5 x 12

⇒ 56 = 60

Is this proportion true?

No, because the cross products are not equal.

The proportion is not true, because 2/12 and 5/28 are not equivalent ratios.